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8ece5c1b84
Allow Symbol literals (and const Symbol instances) as switch expression and as key values in const Maps. This implements the most recent Spec changes. R=regis@google.com Review URL: https://codereview.chromium.org//781203005 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@42230 260f80e4-7a28-3924-810f-c04153c831b5
47 lines
1.3 KiB
Dart
47 lines
1.3 KiB
Dart
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// Test symbol literals.
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library symbol_literal_test;
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import 'package:expect/expect.dart';
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foo(a, b) => Expect.isTrue(identical(a, b));
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var check = foo; // Indirection used to avoid inlining.
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testSwitch(Symbol s) {
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switch(s) {
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case #abc: return 1;
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case const Symbol("def"): return 2;
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default: return 0;
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}
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}
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main() {
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check(const Symbol("a"), #a);
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check(const Symbol("a"), #
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a);
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check(const Symbol("ab"), #ab);
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check(const Symbol("ab"), #
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ab);
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check(const Symbol("a.b"), #a.b);
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check(const Symbol("a.b"), #
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a
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.
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b);
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check(const Symbol("=="), #==);
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check(const Symbol("=="), # ==);
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check(const Symbol("a.toString"), #a.toString);
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Expect.equals(1, testSwitch(#abc));
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const m = const <Symbol, int>{#A:0, #B:1};
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Expect.equals(1, m[#B]);
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// Tries to call the symbol literal #a.toString
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Expect.throws(() => #a.toString(), (e) => e is NoSuchMethodError); /// 01: static type warning
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}
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